/* 顶部导航栏 */
.o_meun {
    height: 48px;
    background-color: rgb(41, 111, 183);
    text-align: center;
}

.menu {
    position: relative;
    justify-content: center;
    list-style-type: none;
    display: flex;
}

.menu li {
    margin-top: 5px;
    position: relative;
    display: inline-block;
}

.menu a {
    display: block;
    color: white;
    text-align: center;
    text-decoration: none;
    padding: 0 10px;
    font-size: 16px;
}